Sanding machine



FIG. 1 is a side elevational view of the sanding machine showing my new design;

FIG. 2 is a front elevational view;

FIG. 3 is a rear elevational view; and

FIG. 4 is a top plan view.

The side opposite to that shown in FIG. 1 is identical in appearance to the showing of FIG. 1. 

The ornamental design for a sanding machine, as shown and described. 